TRB's Airport Cooperative Research Program (ACRP) Web-Only Document 44: Understanding FAA Grant Assurance Obligations Volume 3: Research Report summarizes the research efforts and results of research conducted to develop a guidebook on Understanding FAA Grant Assurance Requirements. The results of this research include the Guidebook itself (Volume 1), Technical Appendices (Volume 2), which provides supplemental information on the requirements, and a PowerPoint presentation that can be adapted to the needs of individual users and their circumstances.